unshadow
Merge passwd and shadow files for auditing
TLDR
Combine system passwd and shadow
$ sudo unshadow /etc/passwd /etc/shadow
Combine arbitrary files$ sudo unshadow [path/to/passwd] [path/to/shadow]
SYNOPSIS
unshadow PASSWDFILE SHADOWFILE
DESCRIPTION
unshadow combines /etc/passwd and /etc/shadow files to create a traditional Unix password file format. This unified format is required by password cracking tools like John the Ripper.The utility is part of the John the Ripper project and is used in authorized password security auditing to prepare password hashes for analysis.
INSTALL
sudo apt install john
sudo dnf install john
sudo pacman -S john
sudo apk add john
sudo zypper install john
brew install john
nix profile install nixpkgs#john
CAVEATS
Requires root privileges to read shadow file. Should only be used for authorized security testing. Output contains sensitive password hashes.
HISTORY
unshadow was developed as part of the John the Ripper password cracker project to handle modern Unix systems that separate password hashes into the shadow file.
